setbackn.挫折;失败;退步
setback of education挫折教育
setback corner joint内收转角缝
setback of the market市场回落
setback arming device后坐保险机构
setback - resistant耐挫折
setback horizontal load立根水平载荷
setback and frustruation挫折
Setbacks made him downcast.挫折使他沮丧。